Centrifugal separating machine



June 9;" 1925.

W. APPEL CENTRIFUGAL SEPARATING MACHINE Filed March 14, 1925 Patented J une 9, 1925.

PATENT WILLEM .AP-PEL, OF SDERABAYA, DUTCH EAST INDI ES.

OENTRIFUGAL SEIARATING MACHINE.

Application filed March 14, 1925. Serial No. 15,619.

To all whom it vim-y concern:

Be it known that I, lVILLnM ArrEL, a citizen of the Dutch East Indies, a resident of the city of Soerabaya, Dutch East Indies, have invented certain new and useful Iinprovements in Centrifugal Separating chines, of which the following is a full, clear, and exact specification.

My invention relates to improvements in centrifugal separating machines and; especially in those used for the separation ofthe syrup from (crystalline sugar and having a perforated outer wall, a perforated inner plate, or the like, and an intermediate perforated corrugated plate.

The object of the invention. is to provide a centrifugal separating machine w'hicltiIeX- ercises less resistance against the flow of the syrup towards the outlet openings after the same has passed the perforated inner plate than is the case in. machines now generally in use. Another object is to; provide a method of reducing this resistance. Still another object is to provide a corrugated or waved plate suited to be used in centrifugal separating machines for the purpose of diminishing the resistance to the flow of the syrup. l

The wall of an ordinary centrifugal ma.-

chine comprises an intermediate member made of gauze and situated between aperforated inner plate and a perforated outer wall, or drum. I will presume that the machine is used for separating syrup from crystalline sugar.

During the operation of the machine the syrup flows first between the crystals and.

then passes through the perforations of the inner plate and 1s evenly distributed over the gauze and passes therethrouglr.

The gauze usually employed has about 480 meshes per 10 square inches and as in a rather short time a sticky waxy means is deposited between the wires of the gauze and the wall of the, machine, there are formed 480 cells with nearly closed sidewalls.

In the outer wall of the machine there are only about 6 openings per 10 square inches and the syrup, which lies divided in 480 cells per 10 square inches will only reach the said 6 openings with great difliculty. Such a wall, provided wit-h oneintermediate wire gauze, exercises such a greatresistance against the flow of the syrup towards the outlet openings, that it has been proposed in various ways to reduce this resistance, without lengthening the time necessary for treatment, but always without success up to the present.

' "According to my present in ention anv intermediateplate is used between the inner plate and the outer wall which plate is corrugated, or waved, the corrugations, or waves, running vertically and having slop ing sides and being perforated, or provided with openings, all situated inthe same $10131- ing side of the respective corrugations, or waves, or of alternate corrugation-s, or

waves, or any desired number of them, so

that the perfo 'ations, or openings, when the apparatus is in use are at, or about, right angles. to'the direction'of flow of the To. obtain a Still better effect the forations, or openmgs, may

syrup; sa d peralso extend somewhat over either, or both, of the bendsv of} the waves, or corrugations,

One of the slopes of each corr1=1gation, or wave, may be steeper than the other and the perforations, or openings, be in the sleeper of them.

In this manner the flowing away of the syrup, is facilitated because, after it has passed the perforations of the inner plate it can readily pass to the perforations in theouter wall, or drum, the resistance be: ing so much lessened that the time for the separating operation is considerably. di minished, say by about twenty per cent.

Inthe accompanying drawing,

Figure l showsju. horizontal section part a of a wall of a centrifugal machine provided;

with means in accordance with this invention, this also being drawn to. an enlarget-l' scale.

Figure 2 is a front view of partof a corrugatedor waved plate in accordance with:

the invention.

The, perforated inner plate is marked 1 and the perforated outer wall, or drum, is marked 2. I

The direction of rotation. of the machine is: indicated by the arrow 43 and the movement of the syrup relative to the wall is indicated by the arrows 5;

Between the plate 1 and the wall 2 a perforated, corrugated or waved, plate 6 is arranged; and the slopes of the corrugations,'or waves, wherein perforations 6 are made, are situated at about right angles to the direction of movement of, the syrup as indicated by the arrows 5, the direction of ameter the circumference of which is aboutninety five inches, when corrugations of about 0.24 of an inch are used, there willbe say 400 corrugations, or waves, over the whole circumference. If the height of the wall be 18 inches, the surface of the wall will be about 1710 square inches. Assunr ing that, in the outer drum, there are six perforations per ten square inchesthen the total number of perforations in the drum will be about 1026. The-tunnels 7 are roomy enough to allow the separated syrup to pass, without much resistance, to the perforations of the drums and by placing the perforations at about right angles-to the direction of flow of the syrup there is very little hindrance to the flow of the syrup into the said tunnels. v

This reduction of resistance is very great as compared with a wall provided with gauze, especially where particles may be present in the matter. driven off.

In the form of the invention illustrated the unperforated sides of the corrugations, or waves, serve as guides to each perforation.

V The improved action is increased when the perforations not only occupy the slopes of the corrugations, or Waves, but also extend somewhat over the bends thereof as this still more diminishes the resistance, increases the free circulation and avoids the deposit of syrup in so-called dead places. In applying the corrugated, or waved, plate to the machinecare must be taken that it is placed in the right position as to the direction of rotation and consequent flow of the syrup. If the plate were placed upside down in the machine the perforated slopes would be parallel to the direction of the movement of th syrup and theunperforated slopes at right angles thereto, which would of course be very unfavourable to the action.

Although I have referred to the machines crystalline sugar, the said machines can of course be alsoused for any other separating purpose for which they may be suitable.

I claim;

1. In a centrifugal separating machine, a perforated outer wall, a perforated inner plate, a member interposed between the wall and plate, said member 'comprisinga perforated corrugated plate with its corrugations extending parallel to the axis of the machine, all its perforations being in come spondingslopin sides of the corrugations.

2. In a centrifugal separating machine, a member comprising a perforated corrugated plate with its corrugations extending parallel to the axis of the machine, all its perforations being in corresponding sloping sides of the corrugations. I

3. In a centrifugal separating machine, a perforated outer wall, a perforated inner plate, a member interposed between the wall and plate, said member comprising a perforated corrugated plate with its corrugations extending parallel to the axis of the machine, all its perforations being in corresponding sloping sides'of the corrugations,

said perforations extending somewhat over at least one of the adjacent bends limiting each said corresponding sloping side.

4:. A perforated corrugated plate for centrifugal machines, all the perforations being situated in corresponding sloping sides of the corrugations, one sloping side of each corrugation being steeper than the other, the perforations being'in the steeper sides.

i 5. A perforated corrugated plate for cen trifugal machines, all the perforations being situated in corresponding sloping sides of the corrugations, the perforations extending somewhat over at least one of the bends dc fining each ofsaid sloping sides, one sloping side of each corrugation being steeper than the other, the perforations being" in the steeper sides.

6. In acentrifugal separating machine, a member comprising a perf rated corrugated plate with its corrugations extending parallel to the axis of the machine, all its perforations being in corresponding sloping, sides ofthe corrugations, one sloping side of each corrugation being steeper than the other and the perforations being in the steeper sides. I I

In testimony whereof, I have signed my name to this specification. D IVILLEM APPEL. 

